Working on live wiring can be dangerous, and could lead to property damage/loss, personal injury, and/or death. To test voltage, you ‘ll want to set the meter to the “Volts AC” setting. In the US a lighting circuit is typically 120 volts, so you would choose the “200” setting typically found on most meters.
How to measure ac voltage Turn the dial to ṽ. Some digital multimeters (DMMs) also include m ṽ . First insert the black lead into the COM jack. Next insert the red lead into the VΩ jack. Connect the test leads to the circuit: black lead first, red second. Read the measurement in the display.
To use the multimeter , set it to read resistance. It may have an ohms symbol for this setting. After this, place the leads of the multimeter on the speaker terminals. You can touch the positive and negative leads to either terminal when reading resistance.
How to Test for Continuity with a Digital Multimeter Turn the dial to Continuity Test mode. It will likely share a spot on the dial with one or more functions, usually resistance (Ω). With the test probes separated, the multimeter’s display may show OL and Ω. If required, press the continuity button.
To test the battery , turn on your voltmeter , put the voltmeter on DCV and make sure that it is far above the battery voltage, on most voltmeters there is a setting “20” in the DCV area, so switch your voltmeter to that setting.
A multimeter is a device used to measure resistance and voltage in an object. To do this it emits a small amount of voltage itself. If you decide to put one cable into your blood stream on one arm, and the other cable into the other arm, it will result in your immediate death. Badaboom, you ‘re dead.
Safety Tips to Measuring Voltage With a Multimeter Do not use your test leads if the protective insulation on the leads or probes is cracked or worn. The movement of current from one hand to the other during an electric shock is the most dangerous. Both DC and AC voltage can be very dangerous.
Another one shows an explosion probably caused by a cheap fuse not capable of breaking large currents. However, if you subject a multimeter to DC (as when testing, say, a computer’s switching power supply), arcs will sustain (because the current has no zero crossing like in AC).
You have to set the multimeter to a range that it can measure . For example, 2V measures voltages up to 2 volts , and 20V measures voltages up to 20 volts . So if you’ve measuring a 12V battery, use the 20V setting.